I brewed the Oktoberfest recipe from Brewing Classic Styles as my first lager and I loved it. The combo of Pils, Vienna and Munich with a touch of CaraMunich gives a great malt complexity that is perfect for this style.

I personally can't go 100% Munich because I don't like the peppery flavor. I know some people are less sensitive to that though. I've been brewing an Oktoberfest/Märzen-ish beer spring and fall for a few years. The past two iterations have been my favorites. They're both basically the same: